I'm having a bit of trouble, could you ?

Need showing work for this problem 56.25 ×25.80

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units

Can anyone explain to me how to do this? anything will .